我单位一辆东风EQ 1090型专用车装有EQ6100-1型汽油发动机。该车行驶到6万多公里时,发动机动力不足,排气管发出有节奏的“隆隆”声,配气机构有较沉重的敲击声(类似气门脚的响声,但比该响声得沉重)。检查表明,气门间隙正常。在逐缸作断火试验时发现:第1缸不工作,该缸的气缸压力低于正常值(200kPa),但其油、电路无故障。在拆下气缸盖,对气 I unit a Dongfeng EQ 1090 special vehicle equipped with EQ6100-1 type gasoline engine. The car traveled to more than 60,000 kilometers, the engine power shortage, the exhaust pipe issued a rhythmic “rumbling” sound, the valve body has a heavier percussion sound (similar to the foot valve sounds, but louder than the sound) . Inspection shows that the valve clearance is normal. In the cylinder by cylinder for fire test, it is found that the first cylinder is not working, the cylinder pressure of the cylinder is lower than the normal value (200 kPa), but the oil and the electric circuit have no trouble. Remove the cylinder head, on the gas